Barry also touched on Kate's amazing post-birth appearance, which has been the subject of huge debate in recent days, saying the fact that she'd put in such as huge effort made the decision to edit her picture even worse.
"I can only imagine the pressure she put on herself to make sure a photo she knew would be seen by millions around the world would be a good one," she said.
"What message is this sending to girls? That despite posing in front of the world's cameras hours after giving birth looking immaculate, elegant and absolutely beautiful, the Duchess of Cambridge was still not quite good enough for the front cover of the mag?" she said.
Followers agreed wholeheartedly and criticised the magazine for its decision to alter the snap.
"It's wrong, she's just given birth," one wrote. "Why can we not celebrate and give this couple some respect."
Others were offended by the poor quality of the editing, with one saying it was 'amateur' and another commenting that they looked like animated characters from the computer game Sims.
It's not the first time the magazine title has been at the centre of a Photoshopping controversy involving the royals.
In 2015, the Australian edition of Woman's Day provoked outrage around the world with a heavily altered image of the Duchess Of Cambridge on its front cover.
Woman's Day was contacted by the Herald and has declined to comment.
